Sudoku #h331

Sudoku game, level: Hard #331. This Sudoku have 25 given numbers (clues)..
Structure: 3 (2 pcs.), 6 (2 pcs.), 7 (2 pcs.), 8 (2 pcs.), 2 (3 pcs.), 5 (3 pcs.), 9 (3 pcs.), 1 (4 pcs.), 4 (4 pcs.), ∑25.


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8
4
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9
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5
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6
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9
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9
6
2
1
4
7
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